I need some diet help my friends.

Drop the quest bars and try things like scrambled eggs with cheese or ham.  Replace yogurt with chicken breast or lunch meat.  Point is fill up on things with less sugar and more protein.  It'll fuel you and fill you up more IMO.  I've been working on how many carbs I can have in a day and it's not many before urges to graze kick in.  The processes sugars, grains, and other things in quest bars might be the thing that is trigging you to want more of the same things through the day.  Oh also if you just love yogurt try one with full fat.  All the light stuff normally has more sugar in it than the ones with actual fat, I mean it's yogurt, it should have fat in it being a dairy product.  Anyway fat isn't your enemy it'll keep you fuller and you may find it has less sugar which kicks the grazing habit.